Natural Hazards Mitigation Plan Appendix G – Orange County Dams City of Newport Beach, APPENDIX G: MAJOR DAMS IN ORANGE COUNTY

Res. Drainage Crest Free Dam Dam National Latitude, Year Capacity Height Length Width Volume Owner Stream Area Area Elev. Board Type Comments Hazard Name No. ID Longitude Built (Ac-Ft) (Ft) (ft) (ft) (yd^3) (Acres) (mi^2) (ft) (ft)

County of 33.688, Agua Chinon Agua Chinon 1012 -017 CA01361 Orange -117.7 Wash 1998 256 16 2.17 636 10.5 41 480 20 ERTH 176,000 Significant Bee Canyon Retention County of 33.708, Bee Canyon Basin 1012-009 CA01360 Orange -117.71 Wash 1994 243 14 1.29 581 11.5 62 570 25 ERTH 66,000 High

City of 33.61, Tributary Big Big Canyon 1058-000 CA00891 Newport Beach -117.86 Canyon Cr 1959 600 22 0.04 308 5.5 65 3824 20 ERTH 508,000 High

Bonita The Irvine 33.632, Canyon 793-004 CA00747 Company -117.848 1938 323 50 4.2 151 8 51 331 20 ERTH 43,000 Brea Dam (Brea Federal - 33.8917, Reservoir) CA10016 USCOE -117.925 1942 4,018 162.7 22.0 295 16 87 1,765 20 ERTH 680,472

Carbon Federal - 33.915 Carbon Canyon CA10017 USCOE -117.6433 Canyon Creek 1961 7,033 221 19.3 499 24 99 2,610 20 ERTH 150,000 30 MG Central Reservoir 1087-000 CA01113 City of Brea Offstream 1924 92 5 0 392 30 1596 ERTH Metropolitan Water District 33.912, Diemer No. 8 35 -009 CA00220 of SoCal -117.82 Offstream 1968 18 1 0.007 828 0.6 172 1004 9 RECT Diemer Metropolitan Ozone Water District 33.9115, Contact Basin 35-022 CA01492 of SoCal -117.82 Offstream 2011 23 0.27 0 840.25 1.7 32 1012 1 RECT 152,000 Metropolitan Diemer Water District 33.91, Reservoir 35-010 CA00221 of SoCal -117.82 Offstream 1963 80 5 0 811.4 3.7 22 1880 RECT

Dove Canyon 33.638, Dove Canyon 790 -000 CA01248 Master Assoc. -117.57 Dove Creek 1989 415 16 0.96 1100 10 88 700 55 ERTH 463,000 East Hicks Canyon Retarding County of 33.735, Hicks Canyon Basin 1012-015 CA01415 Orange -117.72 Wash 1997 75 6 0.54 571 9.5 49 1168 25 ERTH 339,400

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Natural Hazards Mitigation Plan Appendix G – Orange County Dams City of Newport Beach, California

Res. Drainage Crest Free Dam Dam National Latitude, Year Capacity Height Length Width Volume Owner Stream Area Area Elev. Board Type Comments Hazard Name No. ID Longitude Built (Ac-Ft) (Ft) (ft) (ft) (yd^3) (Acres) (mi^2) (ft) (ft) Eastfoot Retarding 33.7525, Peters Canyon Basin 1799-000 CA01496 City of Irvine -117.75 Wash 2007 213 9.7 0.51 421 8.2 38.5 1,000 25 ERTH 300,000

El Toro El Toro Water 33.623, Tributary Oso Reservoir 1041-000 CA00875 District -117.67 Creek 1967 877 21 0.04 632 9 106 900 30 ERTH 550,000 Federal – 33.898, East Fullerton Fullerton CA10018 USCOE -117.88 Creek 1941 706 60 5.0 307 17 47 575 15 ERTH 160,000 Galivan Retarding County of 33.566, Basin 1012-012 CA01427 Orange -117.68 2000 169 17 13.4 273 5.3 14 600 1 ERTH 6,000 County of 33.603, Harbor View 1012-002 CA00830 Orange -117.87 Jasmine Gulch 1964 28 3 0.39 190 20 65 330 60 ERTH 63,000 Hicks Canyon Retention County of 33.735, Hicks Canyon Basin 1012-014 CA01414 Orange -117.72 Wash 1997 110 8 0.83 690 9.5 60 806 25 ERTH 367,800 Lower Peters Canyon Retarding County of 33.755, Peters Canyon Basin 1012-005 CA01207 Orange -117.77 Wash 1990 206 14 2.15 325.3 4.8 52 1166 16 ERTH 175,000

Marshburn Tributary Retarding County of 33.694, Marshburn Basin 1012-011 CA01426 Orange -117.73 Channel 1998 282 26 5.8 378 11.5 27 2456 20 ERTH 204,000

Mission Viejo, Lake Mission Lake 1794-000 CA01122 Viejo Assn. Inc. -117.65 Oso Creek 1976 4,300 150 3.6 711 9 123 1,750 104 ERTH 1,376,200

Orange Metropolitan 33.937, Tributary County Water District -117.88 Fullerton Reservoir 35-007 CA00218 of SoCal Creek 1941 217 7 0.01 662.5 3 103 655 88 ERTH 298,200 Orchard Estates Tributary Retarding County of 33.738, Rattlesnake Basin 1012-016 CA01436 Orange -117.75 Canyon 1999 138 11 0.63 408 8 21 810 25 ERTH 63,500 Tributary Palisades South Coast 33.463, Prima Reservoir 1022-002 CA00843 Water District -117.65 Deshecha 1963 147 6 0.03 436 6 146 620 20 ERTH 300,000

Peters County of 33.7, Peters Canyon Canyon 1012-006 CA00746 Orange -117.768 Wash 1932 1090 65 1.5 547.8 5 54 580 10 ERTH 111,100

Santa Margarita 33.633, Canada Portola 2013-002 CA01183 Water District -117.58 Gobernadora 1980 586 20 0.18 946 10 53 1,200 20 ERTH 206,500

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Natural Hazards Mitigation Plan Appendix G – Orange County Dams City of Newport Beach, California

Res. Drainage Crest Free Dam Dam National Latitude, Year Capacity Height Length Width Volume Owner Stream Area Area Elev. Board Type Comments Hazard Name No. ID Longitude Built (Ac-Ft) (Ft) (ft) (ft) (yd^3) (Acres) (mi^2) (ft) (ft)

Rattlesnake Irvine Ranch 33.728, Rattlesnake Canyon 1029-003 CA00855 Water District -117.74 Canyon 1959 1,480 60 2.02 418 6 79 980 15 ERTH 445,600 33.618, Rossmoor No El Toro Water -117.73 Tributary San 1 1041-002 CA00753 District Diego Creek 1964 43 3 0.23 320 3.5 36 305 15 ERTH 22,000 Rossmoor Retarding County of 33.787, Los Alamitos Basin 1012-013 CA01443 Orange -118.09 Channel 2002 175 25 2.7 14.2 4.2 14 95 13 ERTH 12,000 Round Canyon Retarding County of 33.698, Round Canyon Basin 1012-010 CA01378 Orange -117.69 Wash 1994 286 16 1.698 665 10.5 98 750 25 ERTH 149,000

San Joaquin Irvine Ranch 33.62, Tributary Reservoir 1029-000 CA00853 Water District -117.64 Bonita Creek 1964 380 24 19.9 245 15 65 385 34 ERTH 116,000

Irvine Ranch 33.648, Sand Canyon 1029-002 CA00854 Water District -117.6 Sand Canyon 1912 960 51 6.76 202 8.5 58 861 10 ERTH 134,787

Serrano Water Santiago District & Irvine 33.785 Creek 75-000 CA00298 Ranch WD -117.72 1933 25000 650 63.1 810 20 136 1425 10 ERTH 789,000 Sulphur County of 33.55, Creek 1012-007 CA00873 Orange -117.71 Sulphur Creek 1966 520 40 4.8 202 10 42 485 25 ERTH 150,000

Syphon The Irvine 33.71, Tributary Canyon 793-009 CA00749 Company -117.73 Newport Bay 1949 500 27 0.29 385 7 59 843 10 ERTH 145,000 Trabuco Canyon Water 33.643, Tributary Trabuco 2030-002 CA01241 District -117.56 Dove Creek 1984 138 5 0.05 1280 5.5 108 620 20 ERTH 166,000 Trabuco Retarding County of 33.695, San Diego Basin 1012-008 CA01399 Orange -117.76 Creek 1996 390 22.25 3.17 201 3.5 18 2250 20 ERTH 14,160 Oglebay Trampas Norton Ind. 33.498, 1795-006 CA01123 Sands -117.59 Canyon 1975 5700 96 0.91 600 5 183 1300 20 ERTH 1,900,000

Upper Santa Margarita 33.5883, Tributary to Chiquita 2013-3 CA01553 Water District -117.62 2012 753.5 15.65 0.035 867.5 7.5 177.2 965 23.75 ERTH 1,377,500

Santa Margarita 33.658, Upper Oso 2013-000 CA01145 Water District -117.63 Oso Creek 1979 3,700 115 1.13 962 7 142 800 60 ERTH 1,109,000

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Natural Hazards Mitigation Plan Appendix G – Orange County Dams City of Newport Beach, California

Res. Drainage Crest Free Dam Dam National Latitude, Year Capacity Height Length Width Volume Owner Stream Area Area Elev. Board Type Comments Hazard Name No. ID Longitude Built (Ac-Ft) (Ft) (ft) (ft) (yd^3) (Acres) (mi^2) (ft) (ft)

Lake Hills Community 33.625, Tributary San Veeh 796-000 CA00750 Church -117.73 Diego Creek 1936 185 16 1.7 287 6.3 37 417 14 ERTH 22,060 County of 33.815, Villa Park 1012-000 CA00829 Orange -117.77 Santiago Creek 1963 15,600 480 83.4 584.3 18.3 118 119 20 ERTH 835,000 Walnut 33.842, Walnut Canyon 1037-000 CA00869 City of Anaheim -117.75 Canyon 1968 2570 47 0.33 847 6 187 930 30 ERTH 957,000 Tributary County of 33.872, Santa Ana Drained in Yorba 1012-003 CA00831 Orange -117.61 River 1907 1,200 87 1 311 5.4 45 920 12 HYDF 110,000 1969. 33.890, Santa Ana Being Prado Dam 9000-022 CA10022 Federal -117.64 River 1941 383,500 6,695 2,255 566 23 106 2,280 30 ERTH 3,389,000 improved.

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